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nauful / LibUA

Open-source OPC UA client and server library
Apache License 2.0
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OPC node value update event #85

Closed fch96733357 closed 2 years ago

fch96733357 commented 2 years ago

Hi, I am using LibUA .net library to integrate with my database system, I am able to create nodes from database, and update nodes value from my application using socket; I just wonder how to create write request event for my nodes (read&write), when client is updating (set new value) the node's value, I am able to capture the new value so that I can pass the new value to my application. Something like OnValuechanged(node mnode,int newvalue).

Thanks and best regards Feng Chonghai Fch96733357@gmail.com

nauful commented 2 years ago

Try implementing public virtual UInt32[] HandleWriteRequest(object session, WriteValue[] writeValues) in your server Application. This will notify you of any values written over UA to your database.

fch96733357 commented 2 years ago

Nauful, Thank you very much for quick response.

  Yes, I did try to implement HandleWriteRequest virtual function, however, when I tried to write new value via OPC UA client, debug windows shown below

The new value does not in writeValues[], is it this correct?

Best Regards Feng

Sent from Mail for Windows

From: nauful Sent: 2022年7月12日 4:32 To: nauful/LibUA Cc: fch96733357; Author Subject: Re: [nauful/LibUA] OPC node value update event (Issue #85)

Try implementing public virtual UInt32[] HandleWriteRequest(object session, WriteValue[] writeValues) in your server Application. This will notify you of any values written over UA to your database. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>

nauful commented 2 years ago

Hello Feng,

Could you please paste the screenshot in Github? I don't see any image if you replied via email.

fch96733357 commented 2 years ago

Hi Nauful,

 Thanks for your great OPC lib, it solved my problem. Thanks a lot
fch96733357 commented 2 years ago

Close

fch96733357 commented 2 years ago

Thanks Nauful, I have managed to get it work, because I did not initialize value.

Best Regards Feng

Sent from Mail for Windows

From: Feng ChongHai Sent: 2022年7月12日 8:19 To: nauful/LibUA; nauful/LibUA Cc: Author Subject: RE: [nauful/LibUA] OPC node value update event (Issue #85)

Nauful, Thank you very much for quick response.

      Yes, I did try to implement HandleWriteRequest virtual function, however, when I tried to write new value via OPC UA client, debug windows shown below The new value does not in writeValues[], is it this correct?

Best Regards Feng

Sent from Mail for Windows

From: nauful Sent: 2022年7月12日 4:32 To: nauful/LibUA Cc: fch96733357; Author Subject: Re: [nauful/LibUA] OPC node value update event (Issue #85)

Try implementing public virtual UInt32[] HandleWriteRequest(object session, WriteValue[] writeValues) in your server Application. This will notify you of any values written over UA to your database. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>